/*!
 * jQuery Print Previw Plugin v1.0
 *
 * Copyright 2011, Tim Connell
 * Licensed under the GPL Version 2 license
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * Date: Sun Mar 25 00:00:00 2011 -000
 */

(function($) {

    // Initialization
    $.fn.printPreview = function() {
        this.each(function() {
            $(this).bind('click', function(e) {
                e.preventDefault();
                if (!$('#print-modal').length) {
                    $.printPreview.loadPrintPreview();
                }
            });
        });
        return this;
    };

    // Private functions
    var mask, size, print_modal, print_controls;
    $.printPreview = {
        loadPrintPreview: function() {
            // Declare DOM objects
            print_modal = $('<div id="print-modal"></div>');
            print_controls = $('<div id="print-modal-controls">' +
                    '<a href="#" class="print" title="Print page">Print page</a>' +
                    '<a href="#" class="close" title="Close print preview">Close</a>').hide();
            var print_frame = $('<iframe id="print-modal-content" scrolling="no" border="0" frameborder="0" name="print-frame" />');

            // Raise print preview window from the dead, zooooooombies
            print_modal
                    .hide()
                    .append(print_controls)
                    .append(print_frame)
                    .appendTo('body');
            // The frame lives
            var print_frame_ref = window.frames["print-frame"].document;
            print_frame_ref.open();
            print_frame_ref.write('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">' +
                    '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">' +
                    '<head><title>' + document.title + '</title></head>' +
                    '<body></body>' +
                    '</html>');
            print_frame_ref.close();

            // Grab contents and apply stylesheet
            $('body', print_frame_ref).html($('body > *:not(#print-modal):not(script)').clone());
            $('head link[media*=print], head link[media=all]').each(function() {
                $('head', print_frame_ref).append($(this).clone().attr('media', 'all'));
            });

            // Disable all links
            $('a', print_frame_ref).bind('click.printPreview', function(e) {
                e.preventDefault();
            });

            // Introduce print styles
            $('head').append('<style type="text/css">' +
                    '@media print {' +
                    '*//* -- Print Preview --*//*' +
                    '#print-modal-mask,' +
                    '#header, #menu, #footer {' +
                    'display: none !important;' +
                    '}' +
                    '}' +
                    '#header, #menu, #footer{' +
                    'display:none' +
                    '}' +
                    '</style>'
                    );
            // Load mask
            $.printPreview.loadMask();
            // Disable scrolling
            $('body').css({overflowY: 'hidden', height: '100%'});
            $('img', print_frame_ref).load(function() {
                print_frame.height($('body', print_frame.contents())[0].scrollHeight);

            });

            // Position modal            
            starting_position = $(window).height() + $(window).scrollTop();
            var css = {
                top:         starting_position,
                height:      '100%',
                overflowY:   'auto',
                zIndex:      10000,
                display:     'block'
            }

            print_modal
                    .css(css)
                    .animate({ top: $(window).scrollTop()}, 400, 'linear', function() {
                print_controls.fadeIn('slow').focus();
            });

            print_frame.height($('body', print_frame.contents())[0].scrollHeight);

            // Bind closure
            $('a', print_controls).bind('click', function(e) {
                e.preventDefault();
                if ($(this).hasClass('print')) {
                    window.print();
                }
                else {
                    $.printPreview.distroyPrintPreview();
                }
            });
        },

        distroyPrintPreview: function() {
            print_controls.fadeOut(100);
            print_modal.animate({ top: $(window).scrollTop() - $(window).height(), opacity: 1}, 400, 'linear', function() {
                print_modal.remove();
                $('body').css({overflowY: 'auto', height: 'auto'});
            });
            mask.fadeOut('slow', function() {
                mask.remove();
            });

            $(document).unbind("keydown.printPreview.mask");
            mask.unbind("click.printPreview.mask");
            $(window).unbind("resize.printPreview.mask");
        },

        /* -- Mask Functions --*/
        loadMask: function() {
            size = $.printPreview.sizeUpMask();
            mask = $('<div id="print-modal-mask" />').appendTo($('body'));
            mask.css({
                position:           'absolute',
                top:                0,
                left:               0,
                width:              size[0],
                height:             size[1],
                display:            'none',
                opacity:            0,
                zIndex:             9999,
                backgroundColor:    '#000'
            });

            mask.css({display: 'block'}).fadeTo('400', 0.75);

            $(window).bind("resize..printPreview.mask", function() {
                $.printPreview.updateMaskSize();
            });

            mask.bind("click.printPreview.mask", function(e) {
                $.printPreview.distroyPrintPreview();
            });

            $(document).bind("keydown.printPreview.mask", function(e) {
                if (e.keyCode == 27) {
                    $.printPreview.distroyPrintPreview();
                }
            });
        },

        sizeUpMask: function() {
            if ($.browser.msie) {
                // if there are no scrollbars then use window.height
                var d = $(document).height(), w = $(window).height();
                return [
                    window.innerWidth || // ie7+
                            document.documentElement.clientWidth || // ie6
                            document.body.clientWidth,                     // ie6 quirks mode
                    d - w < 20 ? w : d
                ];
            } else {
                return [$(document).width(), $(document).height()];
            }
        },

        updateMaskSize: function() {
            var size = $.printPreview.sizeUpMask();
            mask.css({width: size[0], height: size[1]});
        }
    }
})(jQuery);